Automatic draft-regulator.



PATENTED 00T. a, 1907.

. W. SALMONL AUTOMATIC DRAFT REGULATOR.

APPLICATION FILED APEUI, 1906.

A UNITED STATES SAMUEL W. SALMON, OF MINERAL POINT, WISCONSIN.

AUTOMATIC DRAFT-REGULATOR.

Specification of Letters Patent.

Patented Oct. 8, 1907.

Application filed April 7, 1906. Serial No.`310,540

To all whom it may concern: v

Be it known that I, SAMUEL W. SALMON, a citizen of the United States,residing at Mineral Point, in the county of Iowa and State of Wisconsin,have invented a new and useful Automatic Draft-Regulator, of which thefollowing is a specification. l

The invention relates to an automatic draft regulator.

The object of the present invention is to improve the construction ofdraft regulators designed for use on forced draft engines and boilers,and adapted to maintain automatically an even draft, whereby a saving inboth fuel and water is effected.

A further object yof the invention is to provide an automatic draftregulator of this character, adapted to relieve the cylinder of backpressure, and capable, when a traction engine is passing between stacks,or other points where there is danger of fire, of enabling a smokestack'to be relieved of the entire exhaust, whereby the engine iseffectually prevented from throwing out any sparks.

With these and other objects in view, the. invention consists in theconstruction and novel combination and arrangement of parts, hereinafterfully described, illustrated in the accompanying drawing, and pointedout in the claims, hereto appended; it being understood that variouschanges in the form, proportion, size and Y minor details ofconstruction, within the scope of the claims, may be resorted to withoutdeparting from the spirit or sacricing any of the advantages of theinvention.

The ligure of the drawing is a sectional view of an automatic draftregulator .constructed in accordance with this invention and shownapplied to a boiler.

Referring to the drawing, l designates the exhaust pipe of a tractionengine, but the improvements herein shown and described are applicableto all force feed engines and boilers. The exhaust pipe l, which extendsfrom the steam chest (not shown) to the smoke stack 2, pierces theboiler 3 at one side thereof, and is provided at the base of the stack2, with an upwardly projecting nozzle 4, from which the exhaust steam isdischarged into the smoke stack to provide a force draft. The transverseportion 5 of the exhaust pipe is arranged horizontally, and thedischarge nozzle 4 extends up ward therefrom at right angles thereto. i

The exhaust pipe communicates at the angle formed by the nozzle and thetransverse portion 5, with a relief pipe 6, a valve 7 being placed atthe inner end of the transverse portion at a point below the nozzle, inposition te receive the full force of the exhaust steam. The valve 7 isprovided at its lower edge with an eye 8, through which passes a pivot9, on which the valve 7 swings. The transverse portion 5 is providedwith an extension l0, located beyond the discharge nozzle 4, andpreferably extending to the opposite side of the boiler,

as shown. The extension l0 forms a casing for a rod Il, and is providedwith a stop 12, consisting of a projection and arranged to limit thebackward or outward swinging of the valve. When the valve is swungbackward to the position illustrated in dotted lines in the figure ofthe drawing, the exhaust pipe is placed in communication with the reliefpipe 6, which extends upward from the exhaust pipe. The upper portion I3of the relief pipe is deflected laterally, and is extended through theadjacent wall of the smoke stack, its discharge end being arrangedexteriorly of the stack. When the valve is open, the exhaust steampasses through the transverse portion of the exhaust pipe and willimpinge against the inclined valve and be deflected into the relief pipe6, from whence it will be discharged into the atmosphere. This willrelieve the smoke stack entirely of the exhaust steam, and the enginewill be eifectually prevented from throwing out any sparks when thesteam is escaping through the relief pipe. This will be foundadvantageous when a traction engine is passing between stacks, or ispassing any point where there is danger of fire.

The valve is provided at its outer or rear face with a centrallyarranged eye I4, and is connected by a suitable pivot with the inner endof the rod 1I. The rod ll pierces the side of the boiler and extendsexteriorly of the same. The outer portion of the rod receives a coiledspring 15, which serves to hold the valve yieldably in its closedposition, and it will permit the valve to open automatically when thepressure of the exhaust exceeds a predetermined point. The valve willthus permit a portion of the exhaust steam to escape through the reliefpipe, and an even draft will be maintained, thereby effecting a savingin both fuel and water. The inner end of the spring bears against acollar 16, or other suitable means carried by the rod l1, and the outerend of the spring engages an operating lever 17, fulcrumed at its lowerend I8 on a suitable support I9, and adapted to be swung inwardly andoutwardly to open and close the valve 7, and to place the desiredtensionion the spring. The lever is provided at an intermediate pointwith an opening, through which the outer end of the rod Il passes, andthe outer end of the rod is threaded to receive a nut lla, a suitablewasher being provided between the nut and the lever, as

shown. The support I9 consists of a bracket composed of upper and lowerportions, the upper portion being provided with a curved series of teeth20, adapted to be engaged by a springactuated dog or detent 2l, which iscarried by the operating lever. Theoperating lever is also providedadjacent to its grip or handle, with a latch lever 22, by means of whichthe spring actuated dog or detent is operated. The upper portion of thebracket is curved, and the teeth are arranged substantially in the arcof a circle.

^ The relief pipe and the valve maybe arranged at different pointsbetween the steam chest and the discharge nozzle Without affecting theresult, but the valve, to be most effective7 should be arranged inposition to receive lie ull impact oi the exhaust steam.

Having thus iully described my invention7 what I 'claim as novel anddesire to secure by Letters Patent,

l. The combination with the exhaust pipe ot a steam engine having adischarge nozzle opening into the stack, of a` relief pipe dischargingexteriorly of the stack. a valve for establishing communication betweenthe exhaust pipe and the relief pipe and for cutting ont the latter. andmeans 'l'or yieldablyv holding the valve closed, said means beingexteriorly adjustable and being provided with exteriorly arrangedoperating mechanism tor manually opening' and closing the valve.

2. The combination of the exhaust pipe ot a steam engine having anozzleopening into the stack and provided with a horizontal transverseconnecting portion and with a horizontal extension located on theoppositie side of the nozzle from the connecting portion7 a valvemounted in the extension, a relief pipe communicating with the extensionin rear of the valve when the latter is closed. said valve being adaptedto open to establish communication between the relief pipe and theexhaust pipe, and means tot: yieldably holding the valve closed. saidmeans being exteriorlyv adjustable, whereby an even dral't is maintainedin the stack.

The combination o1' the exhaust pipe ol a steam engine having`- a nozzleopening into the stack and provided with a transverse connecting portionand with an extension located opposite the connecting portion. a 'alvemounted in the extension, a reliet pipe communicating with the extensionin rear oi the valve when the latter is closed, said valve being adaptedto open to establish conimunication between the reliet pipe and theexhattst-pipe. a rod connected with the valvey a spring disposed on therod for holding the valve yieldahly in its closed position, andoperatingmechanism connected with the rod for manually opening the valveand also engaging the spring for placing the same under tension.

4. The combination ol' the exhaust, pipe ot a steam engine havinganozzle opening into the stack and provided with a transverse connectingportion and with an extension located opposite the connecting portion. avalve mounted in the extension. a reliei' pipe communieating with theextension in rear ot' the valve when the latter is closed. said valvebeing adapted to open to establish communication between the reliet pipeand the exhaust-pipe. a rod connected with the valve, a spring disposedon the, rod lor holding the valve vieldablv in its closed position. anoperating lever connected with the rod and eng; the spring. and meansV[or securingl the operating lever 1n its adjustment.

'lhe combination with an exhaust pipe ol' a steam engine. a reliel'pipe. a valve arranged between the reliet' pipe and the exhaust, pipet'or ettttine ot'i' and controlling communication between the saidpipes. a rod connected with the valve. a spring tor vieldahly holdingthe valve in its closed position. an operating lever connected with therod and engaging the spring. and means t'or securing the lever in itsadjustment.

ti. 'lhe combination with an pipe ot` a .steam engine. a relietpipe. a'alve arranged between the reliet' pipe and the exhaust pipe tor cuttingott' and controlling communication between the said pipes. a rodconnected with the valve. a spring tor vieldablv holding the valve inits closed position. an operating lever connected with tht` rod andengaging the spring. a bracket supporting the lever and provided with aplurality ol` teeth. and means carried h v the lever tor engaging the,teeth to secure the lever in its adjustment'.

ln testimony. that l claim the l'oregoing as my own. I have heretoatlixed in v signature in the presence ot' two witnesses.

exhaust SAMUEL SAlAlt iN.

Witnesses .Tostnn J. ltntnbtnx. Euxien (I. inanvtrrr.

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